Read-out system



G. K. JENSEN READ-OUT SYSTEM June 21, 1960 Filed Nov. 29, v1957' 19 Sheets-Sheet 1 Dn m VN WF. S N E 0 J 2000.0 l. 2000.0 Il 2000.0 2000.0y 02.20 02.20 02.20 02.20 K f000 f000 r000 200 m O R Q. 02.30 n.250 0.2.30 0.200 0.21.0 w 0020 0020 0020 0020 0020 @n r00. roN 00. rmm. 20. m n 00.5.0 Il 002.00000 2002.202 l1 0030 2002.002 Il 0050 2002.202 l 50000 00.?. ...0.1 000120 |22 0230000 00.0.0022 02.00000 00.0.0022 02.00000 rm. r2 r00. f00. r0.0. 0. f5... 2000.0 2000.0 022109.70005 nmm m O mdmmu |OIOZ w 2 (M0 rm. 0 2 0 0.20.0502. 2000.0 002.5000 2000.0 0.2200022.:I 00 000000 20 000.0020020 f0 00 50 fm. 2000 f2 00000000 rm ro. 0. r.. ,0 HHM ATTORNEYS June 21, 1960 G. K. JENSEN BEAD-OUT SYSTEM 19 Sheets-Sheet 2 Filed Nov. 29, 1957 ndi .vdi

INVENT OR GAROLD K. JENSEN ATTORNEYS June 21, 1960 G. K. JENSEN 2,942,107,

READ-OUT SYSTEM Filed Nov. 29. 1957 19 Sheets-Sheet 3 TO AMPLIFIER STAGE I6 B To GATED CLAMP |93 TO GATING CIRCUIT 22B INVENTOR GAROLD K. JENSENv ATTORNEYS June 21, 1960 G. K. JENSEN 2,942,107

READ-OUT SYSTEM Filed Nov. 29, 1957 Y 19 Sheets-Sheet 4 I7 To |5C\ L] AMPLIFIER COUPUNG i STAGE Isa NETWORK i 23` l I ITo ,HIGH PASS IFM TER I8 TO TERMINAL 45 FIG.Z

INVENTOR GAROLD K. JENSEN TO GATING CIRCUIT 22B ATTORNEY5 G. K. JENSEN READ-OUT SYSTEM June 2l, 1960 19 Sheets-Sheet 5 Filed Nov. 29. 1957 GAROLD K. JENSEN ATTORNEYj G. K. JENSEN READ-OUT SYSTEM June 21, 1960 19 Sheets-Shee1t 6 Filed Nov. 29. 1957 GAROLD K. JENSEN ATTORN .5

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ATTORNEY5 G. K` JENSEN READ-OUT SYSTEM June 21,` 1960 19 Sheets-Sheet 9 Filed Nov. 29, 1957 INVENTOR GAROLD K. JENSEN ATTORNEY5 G. K. JENSEN READ-OUT SYSTEM `lune 2l, 1960 19 Sheets-Sheet 10 Filed Nov. 29, 1957 ATTORNEYII G. K. JENSEN READ-OUT SYSTEM June 21, 1960 19 Sheets-Sheet 11 Filed Nov. 29, 1957 ATTORNEYS G. K. JENSEN READ-OUT SYSTEM June 21, 1960 19 Sheets-Sheet 12 Filed Nov. 29, 1957 INVENTOR GAROLD K. JENSEN ATTORNEYj G. K. JENSEN READ-OUT SYSTEM June 21, 1960 v19 sheets-sheet 1s Filed Nov. 29. 1957 INVENTOR GAROLD K- JENSEN ATTOR EY5 G. K. JENSEN READ-OUT SYSTEM June 21, 1960 19 Sheets-Sheet 14 Filed Nov. 29, 1957 GAROLD K. J ENSEN ATTORNEYj G. K. JENSEN READ-OUT`SYSTEM June 2l, 1960 19 Sheets-Sheet 15 Filed Nov. 29, 1957 GAROLD K. J ENSEN ATTO'RNEYj G. K. JENSEN `READ-OUT SYSTEM June 21, 1960 19 Sheets-Sheet 16 Filed Nov. 29, 1957 ATTORN Yj G. K. JENSEN READ-OUT SYSTEM June 2l, 1960 19 Sheets-Sheet 17 Filed Nov. 29, 1957 June 21, 19.60

G. K. JENSEN READ-OUT SYSTEM 19 Sheets-Sheet 18 Filed Nov. 29. 1957 NAIIIJHIHMV NVENTIOR GARO'L D K. J ENSEN {wm-J ATTORNEYS G. K. JENSEN READ-OUT SYSTEM June 21, 1960 Filed Nov. 2'9, 195? 19 Sheets-Sheet 19 GAROLD K. JENSEN f MVL'Q` ATTORNEYS United States Patent O READ-OUT SYSTEM Garold K. Jensen, Fairfax County, Va., assignor to the United States of America as represented by the Secretary of the Navy Filed Nov. 29, 1957, Ser. No. 699,870

. 22 Claims. (Cl. Z50- 27) .(Granted under Title 35, U.S. Code (1952), sec. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

This invention relates in general to an arrangement in which undesirable signals in an electrical circuit are'at tenuated and in particular to an improved read-out system in which undesired signals are substantially suppressed and desired signals are amplified.

In the field of electronics, there are many applications in which it is necessary to suppress undesired signals. For example, in storage tube circuits requiring rapid switching from read to write and vice versa, switching signals applied to a barrier grid storage tube may cause undesirable transients in the output circuit and unbalance of the electron tubes in a voltage regulator connected to the storage tube may generate objectionable square wave signals. In addition, due to the characteristics of a storage tube, there may be shading of the signal readout of the storage tube, i.e., the desired signal may be superimposed on an undesired signal. The transients, square wave signals and the signals causing shading are objectionable in many systems in which the storage tube circuit may find useful application.

Accordingly, it is an object of the present invention to provide an arrangement in which signals causing shading,

undesirable square wave signals and objectionable transients are substantially suppressed.

Another object of the present invention is to provide an arrangement in which a plurality of gated clamps are sequentially controlled to substantially suppress undesired transients.

Another object of the present invention is to provide an arrangement in which feedback is employed to substan-` tially eliminate unbalance of electron tubes in a voltage regulator for a storage tube circuit.

Another object of the present invention is to provide an arrangement in which a plurality of gated clamps are simultaneously controlled to substantially suppress a plurality of series of damped oscillations.

Another object of the present invention is to provide an improved read-out system for a storage tube in which undesired square wave signals, objectionable transients and signals causing shading are substantially removed from the output of the storage tube circuit.

Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood when considered in connection with the accompanying drawing in which like reference numerals designate like parts throughout thereof and wherein:

Fig. 1 is a block diagram of a first embodiment of the present invention.

Fig. 2 is a detailed drawing of the voltage regulator and the storage tube circuit represented as hollow rectangles in Fig. l.

Fig. 3 is a detailed drawing of a coupling network, an

signals causing shading.

connected to the high pass lter to suppress ringing in- ,p 2,942,107 Patented June 21, 1960.

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amplifier stage, a gated clamp 4and a gating circuit, each of which are shown as hollow rectangles in Fig. 1.

Fig. 4 is a detailed drawing of the cathode follower, the feedback circuit, and a gated clamp shown as hollow rectangles in Fig. 1.

Figs. 5A to 5D are a first set of waveforms at selected Figs. 10A to 10C are a set of waveforms of signals at.

selected points in the third embodiment of the present invention disclosed in Fig. 8.

Fig. 11 is a detail of selected portions 0f particular signals shown in Figs. 10B and 10C.

Fig. l2 is a fourth embodiment of the present invention.

Figs. 13A and 13B are a set of waveformsof signals v at selected points in the fourth embodiment of the present invention disclosed in Fig. l2.

In accordance with the present invention, undesired, recurrent signals are removed from theoutput of an electrical circuit by applying the output to an arrangement that includes a plurality of amplier stages. Each of a plurality of gated clamps is connected to a respective one of the amplifier stages and is operated in the predetermined time intervals in which the undesired signals occur to attenuate and substantially remove the undesired signals from the output of the electrical circuit.

In applying the fundamental teachings of the present invention in one embodiment, undesired signals, e.g., signals causing shading, squarewave signals, and objectionable transients are substantially removed from the output of a storage tube circuit by applying the Aoutput to an arrangement that includes a plurality of amplifier stages. Each of a plurality of gated clamps is connected to a respective one of the amplifier stages and is operated in predetermined time intervals to substantially suppress undesirable transients, and a high pass filter is connected to a selected one of the amplifier stages to suppress the In addition, a gated clamp is troduced by the lter and a feedback circuit is connected between a selected one of the plurality of amplifier stages and a voltage regulator that controls the potential applied to a storage tube in the storage tube circuit to balance the electron tubes in the voltage regulator so thatthe square wave signals are substantially removed from the output of the storage tube circuit.

In another embodiment of the present invention, objectionable signals, e.g., square wave signals and signals causing shading, are removed from the output of a storage tube circuit that includes a desired sine wave signal by applying the output of the storage tube circuit to an arrangement employing a plurality of amplifier stages. Each of a plurality of gated clamps is connected to a respective one of the amplifier stages, which includes an electron tube connected to a tuned circuit. The plurality of gated clamps are controlled simultaneously in predetermined time intervals to substantially suppress the series of damped oscillations generated by the application of the leading and trailing edges of the square wave signals and the spikes generated by precedingl gated clamps to the electron tubes and their corresponding tuned circuits. Since the tuned circuits oiier a relatively low 

